rs137852926

Variant names:

• chr4-5681282-A-C
• rs137852926
• NM_147127.5:c.848T>G
• EVC2 p.Ile283Arg

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_147127.5(EVC2):​c.848T>G​(p.Ile283Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I283V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: EVC2 NM_147127.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.98
• Publications: 5 publications found

Genes affected

EVC2 (HGNC:19747): (EvC ciliary complex subunit 2) This gene encodes a protein that functions in bone formation and skeletal development. Mutations in this gene, as well as in a neighboring gene that lies in a head-to-head configuration, cause Ellis-van Creveld syndrome, an autosomal recessive skeletal dysplasia that is also known as chondroectodermal dysplasia. Mutations in this gene also cause acrofacial dysostosis Weyers type, also referred to as Curry-Hall syndrome, a disease that combines limb and facial abnormalities. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

EVC2 Gene-Disease associations (from GenCC):

• acrofacial dysostosis, Weyers type

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet, G2P
• Ellis-van Creveld syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, Myriad Women's Health, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.793
• PP5: Variant 4-5681282-A-C is Pathogenic according to our data. Variant chr4-5681282-A-C is described in ClinVar as Pathogenic. ClinVar VariationId is 3385.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_147127.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EVC2	NM_147127.5	MANE Select	c.848T>G	p.Ile283Arg	missense	Exon 7 of 22	NP_667338.3
	EVC2	NM_001166136.2		c.608T>G	p.Ile203Arg	missense	Exon 7 of 22	NP_001159608.1	Q86UK5-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EVC2	ENST00000344408.10	TSL:1 MANE Select	c.848T>G	p.Ile283Arg	missense	Exon 7 of 22	ENSP00000342144.5	Q86UK5-1
	EVC2	ENST00000310917.6	TSL:1	c.608T>G	p.Ile203Arg	missense	Exon 7 of 22	ENSP00000311683.2	Q86UK5-2
	EVC2	ENST00000475313.5	TSL:1	n.608T>G		non_coding_transcript_exon	Exon 7 of 23	ENSP00000431981.1	A0A0C4DGE7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251448 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461894 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 727248

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000580 AC: 5 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Ellis-van Creveld syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.85
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Pathogenic	0.27
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.75	D
Eigen	Uncertain	0.28
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.70	T
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.79	D
MetaSVM	Uncertain	0.012	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		4.0
PrimateAI	Benign	0.48	T
PROVEAN	Uncertain	-3.1	D
REVEL	Uncertain	0.64
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.033	D
Varity_R		0.50
gMVP		0.81
Mutation Taster		=10/90	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		2.0
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs137852926;

hg19: chr4-5683009;